====== JLC 849 ======
The **JLC 849** is an [[ultra-thin]] watch movement from [[Jaeger-LeCoultre]].

The 849 (and similar **JLC 849RSQ**) is an [[hand-winding]] movement. The JLC 849 is made up of 123 pieces and is 1.85 mm thick. It runs at 21600 vph, has 19 jewels, and a power reserve of 35 hours. It is closely related to the [[JLC 839]], introduced in [[1975]], differing only by the addition of one jewel (at the lower [[second wheel]] pivot) and a redesign of some of the bridges.

The JLC 849 is used in the thinnest mechanical wristwatch currently available, the 4 mm [[Jaeger-LeCoultre Master Ultra Thin Jubilee]].

The two versions of the JLC 849 differ greatly in layout and application. The JLC 849 is used in the round [[Jaeger-LeCoultre Master Ultra Thin|Master Ultra Thin]] line, while the JLC 849RSQ is a [[tonneau]]-shaped movement used in the [[Jaeger-LeCoultre Grande Reverso Ultra Thin SQ|Grande Reverso Ultra Thin SQ]]. The 849RSQ is also skeletonized and decorated; It has 128 pieces and is slightly thicker at 2.09 mm.

===== Applications =====
Jaeger-LeCoultre currently uses this calibre in 4 watches.

  * [[Jaeger-LeCoultre Master Ultra Thin]]
  * [[Jaeger-LeCoultre Master Ultra Thin 38]]
  * [[Jaeger-LeCoultre Master Ultra Thin Jubilee]]
  * [[Jaeger-LeCoultre Grande Reverso Ultra Thin SQ]] (JLC 849RSQ)

===== External links =====
  * [[http://people.timezone.com/library/horologium/horologium0028|The Jaever-LeCoultre Master Ultra Thin: A Study in Simple Elegance]]
  * [[http://www.hodinkee.com/blog/thoughts-on-the-jaeger-lecoultre-master-ultra-thin-jubilee|Thoughts On The Jaeger-LeCoultre Master Ultra-Thin Jubilee (The Thinnest Mechanical Watch In The World)]]
  * [[http://www.thepurists.com/watch/features/8ohms/jlchw/|Jaeger-LeCoultre Master Ultrathin]]


<WRAP ud ud_mov>

**Manufacturer:**
  * [[Jaeger-LeCoultre]]

**Description:**
  * [[Hand-winding]] movement
  * 123 components

**Functions:**
  * Hour/minute

**Data:**
  * 9 [[ligne]]s (20.2 mm), H 1.85 mm
  * 19 [[jewels]]
  * 21600 A/h
  * Power reserve 35 Hours
  * Two-spoke [[Glucydur]] balance
  * [[Nivarox]] 1 spring

**Production period:**
  * 1990's-Current
</WRAP>

{{tag>Movements Ultra-thin_movements Manual_winding_movements Jaeger-LeCoultre_calibres}}